Gustav hilgenstock



G. HILGENS'TOOK.

TUYERE FOR BLAST FURNACES.

Patented Aug. 14, 1883.

' (No ModeL) INVENTOR WITNESSES r pipe terminates-in the upper enlarged part I'o-all willom it may concern.-

UNITED STATES PATENT OFFICE.

GUSTAV 'H'ILeENsTooK, or nonnnn, GERMANY.

TUYERE Foe BLAST-FURNACES.

SPECIFICATION forming part of Letters Patent No. 283,107, dated August 14, 1.883,

Amilicatlon filed July 12. 1883. (No model.) Patented in Germany August 17, 1380, No. 13 039.

Be it known that I, Gnsrnv HILGENSTOOK,

engineer, of Hoerde, in the German Empire,

have invented certain new and useful Improvements in Tuyeres for Blast Furnaces, (for which Letters Patent have heretofore been granted to me bythe government ofGermany, dated August 17, 1880, No. 13,039,) of which the following is a specification. This invention relates to an improved construction ofopen tuyeres for blast-furnaces,

technically known as spraytuyeresf and the invention consists of a tuyere, open at the back and provided with an outwardly flaring exterior wall of elliptical shape, in combination with a spray-nozzle and-with a frame that inclosesthe rear end of the tuyere, and is sup plied with water by a U-shaped spray-pipe, the spray-Water being drawn off at the lower rear end of the frame or casing.

In the accompanying drawings, Figurel represents, a vertical central section of my improved tuyere for blast-furnaces, and Fig. 2 is an end elevation of the same.

Similar letters of reference indicate corresponding parts. The tuyere A is bent of Ushapeand entirely open at its rear end, so that an open cooling-spacea, is formed around the inner wall of the tuyere. The outer wall of the tuyere is made slightly flaring at the lower part,

but with a considerable flare or inclination at the upper part, so that an exterior wall of Thetuyere Ais set into a casing, B, of the wall of the blast-furnacathe inner edge of the casing B beingbent inwardly, so as to form a U- shaped rim, b, which is fitted exactly to the shape of the exterior wall of the tuyere, so as to bind tightly and reliably thereon. The tuyere A, as well as the casing B, at the point of connection with the tuyere, is cooled by means of sprays of water, which are supplied by independent pipes O and D, that are hung to proper clips d d of the casing B. The waterof the tuyere A, and is provided with a large spray-nozzle, 0, having an upwardly and lat-y erally extending portion, e, and alower scoopcooling-Water. The water is shed along the sides and inclined bottom of the tuyere to the bottom of the casin g B, and conducted to a gut 'ter, B, attached tothe outer edge of the bottom, whence it is carried off byasuitable pipe. The water-supply pipe D of the casingB is made of U shape, and perforated, the spray supplied thereby cooling the casing and tuyere at their point of connection, which is in line with the inner wall of the blast-furnace, as shown in Fig. 1.

The advantages of my improved spray-tuyere for blast-furnaces are that no part of the cooling-water can pass into the blast-furnace, which is one of the disadvantages of the closed tuyeres heretofore in use, in which the water forces its way into the furnace at, that point where the tuyere becomes defective by use, so that thereby the quality of the iron is deteriorated. The violent explosions, which are the result of the entrance of water into the blastfurnace, and the damage caused thereby are ,quired. The expense of my improved tuyere is considerably less than the old form of tuy eres, those of welded boiler-iron having proved very effective. They can be made by any skilled blacksmith. near the furnace, so that one is-not compelled to order them in,.iron

works. I The tuyere can also be made of bronze or tempered cast-iron. The spray-pipes can be applied without difficulty and any defect be quickly observed, as the tuyere can be observed up to the apex, and also tested by feeling around the same with the hand, so that any possible danger from defective tuyeres can be fully and entirely avoided.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- :1. A spray-tuyere for blast-furnaces confposed of an open-back tuyere having an internal and a flaring exterior wall, a casing or frame fitted to the outer end of the tuyere, and

nozzle having an upwardly and laterally eitending portion and a lower scoop-shaped portion, whereby both the exterior wall and the apex of the tuyere are supplied with water,

substantially as specified. In testimony thatI claim the foregoing as my invention I have signed my name in pres- 20' ence of two subscribing witnesses.

GUSTAV HILGENSTOCK.

Witnesses:

FUL. BRAOHI, FRANZ ALAM. 

